Derrick drill



Auw-1K8, 1942-. L. E. MATHEws 2,293,396

DERRICK DRILL Filed Oct. 5. 1940 2 Sheets-rSheet 2 INVENTOR, ee Maf/761445,

BY @/M,

ATTORNEYA Patented Aug., '18, 1942 UNITED STATES PATENT OFFICE DERRICK DRILL Lee E. Mathews, Kansas city, Mo.

Application October 5, 1940, Serial No. 359,928

i (o1. 25e-51) 6 Claims.

it is necessary to move the drilling motor out of` alignment with the partially drilled hole in order to be able to position the longer drill b-ar in the hole for operative engagement with the drilling motor. Heretofore this has been accomplished, with this type of derrick drills, by tilting the entire derrick until the drilling motor is out of alignment wth the partially drilled hole, placing the drill bar in the hole then replacing the derrick with the drilling motor in alignment with said hole above the upper end of the drill bar. In some of the larger drilling apparatus screw thread adjusting means have 'been provided for tilting the drilling motor out of alignment with the drill hole, however this method has proven too slow and is not practical for use with this light weight portable derrick drill.

The principal object of the present invention is the provision of a d errick drill having means whereby the drilling motor is so mounted that it can be quickly positioned out of alingment with the hole being drilled to permit the interchange of drill bars for drilling a deeper h ole.

Another object of this invention `is the provision of a, derrick drill having a base frame pro-` vided with a pivotally mounted standard on which is adjustablylmounted a drilling motor having a drill bar, and toggle means operable to tilt said standard relative to the base frame whereby the drilling motor is moved out of alignment with the hole being drilled, to permit` changing of the drill bars.

A further object 4of the invention is the provision of a derrick drill `having a base frame with a vertically disposed standard, for carrying the drilling motor pivotally mounted thereon, and a longitudinally adjustable truss rod interconnecting the upper portion ofV said standard to said base frame, whereby the angled relation of the standard to the frame may be selectively varied.

Other objects are economy and simplicity of construction, ease and speed of operation, and adaptability for use with drill bars of any desired length. i

With these as Well as other objects which will appear during the course of the specification, in

View, reference will now be had to the drawings, wherein:

Fig. 1 is a perspective view of the derrick drill with the relation of certain parts changed.

' Fig. 2 is a side elevation of a derrick drill, with ,parts vthereof vshownin a secondary position in dotted lines, embodying this invention.

Fig. 3 is a fragmentary view of the truss rod with parts in section to disclose the structure.

Fig. 4 isa horizontal section taken on line IV-YIV 0f Fig. 2. y

Throughout the several Views of the drawings like reference characters reiere to similar parts and the numeral I0 designates a base frame of general triangular form mounted on axially disposed wheels I2 and tiller wheel I4 which is operable by means of the tongue I6. This derrick drill is of light form and is especially designed for stone drilling for blasting that is operable by one man.

A vertically disposed standard I8 pivotally carried by base frame I0 is adapted to extend thereabove a suilicient height to permit of insertion of drilling bars of a relatively short pre-determined length, in a. drilling motor carried thereby as hereinafter set forth.

The standard I8 comprises parallel I-beams 28 secured together at their lower ends to tubular member 22 which is mounted for limited rotation on cylindrical base frame member 24 which extends transversely of base frame I0 and in parallel axial relation with wheels I2 whereby the standard is disposed adjacent the central portion of the base frame. The upper ends of l-beams 20 are joined together by cross member 26 on which is mounted sheave wheel 28 with its axis 30 in parallel relation to base frame member 24.

A drilling motor 32 of the compressed fluid, impact type is pivoted at its upper extremity by means of pins or trunnions 34 to a'carriage 36 which is slidably carried by standard I8, see Fig. 4. A series of weights 38 constitute a part Aof carriage 35 and are adapted to t into the inner channels of I-beams 2 for sliding movement therealong and to exert a down pressure on the drill bit during the drilling operation. Any desired number oi weights 33 maybe used to obtain the proper pressure on the drill to facilitate drilling.

lA cable 48 secured by its one end to drilling motor 32 at 42 passes over sheave wheel 28 then around drum t4 which is rotatably mounted in bracket I carried 'by standard I8. Securely attached to drum 44 is a spur gear 68 which intermeshes with a spur pinion 50 mounted for rotation with shaft 52 journaled in bracket 46. The outer end of shaft 52 is provided with a hand Wheel 54 whereby the drum 44 is rotated to raise and lower the drilling motor 32 and its associated drill bar 56 having a drill bit 58. A pawl 60 pivoted at 62 to bracket 46 is adapted to engage the teeth of pinion 50 to prevent the unwinding of cable 40 and the lowering of the drilling motor. The drilling motor is provided with the ordinary flexible feed tube 64 through which a suitable compressed actuating fluid is delivered from any suitable source not shown.

A guide plate 66 hinged to the frame at |58 serves to guide the drilling bar during the starting of the drill hole.

adapted to secure the drum 44 against rotation during certain operations of the apparatus.

An adjustable truss rod 76 bifurcated at its upper end is pivotally mounted in bearings 'I8 which are integral with the upper portion .of standard I8, while the lower portion is, provided with a transverse axle 80 which is journaled in bearings 82 carried by base frame l0 adjacent the tiller wheel I4. This truss rod normally secures the standard in a vertical position which is the desired position for supporting the drilling parts during their operation. The upper Y-shaped portion 84 of the truss rod is tubular in form as shown in Fig. 3 also the lower T- shaped portion 85 thereof is tubular. These tubular sections are adjustably interconnected by means of a telescoping tube 88 provided with a series of holes 90 which are adapted to selectively register with holes 92 formed through tube 86 through which a pin 94 is inserted to secure these parts against relative longitudinal movement. The upper end of tube 88 is slidably mounted in tube 84 and is normally secured against longitudinal movement relative thereto 'by means of a toggle member 9|. Link 93 joined to member 84 by pivot 95 and link 96 pivoted by pin 98 totube 88 are interconnected with arm by the pivoted pin |02. The arm |00 is interconnected with a lever arm |04 which is pivoted intermediate its end at |06 to one of the I-beams 20, and has a hand grip |08 by means of which it may be operated. A stop member I I0 carried by standard I8 is in the path of travel of the upper end I|2 of lever arm |04 Vand serves to limit the movement of the toggle links in one direction. It will be noted that when the toggle member 90 is in the position shown in solid lines in Fig. 2 the truss rod 'I6 will be maintained at a constant length to support the standard in a fixed angle relative to the base frame. When it is desired to break the toggle joint to permit relative movement of tubes 04 and 88, to tilt the standard I8, the operator grasps hand grip |08 to force the toggle links outwardly from the truss rod so that the parts will take the positions shown in dotted lines in Fig. 2.

The standard tilting operation is intended to facilitate rapid changing of the drill bars during the drilling operation. When the drilling operation is to be started the drilling motor 32 is raised to the top of the standard and a short drill bar is positioned in operative relation therewith, with its lower end adjacent the top of the ground structure G. The drill is now operated until the drilling parts have reached their downward limit to form a brake H. The drilling motor is now raised to its upward limit and the short drill rod is removed in the usual manner,

A brake wheel 'I0 having a brake band I2 and an operating lever 'I4 isv and the toggle is then broken and the standard is tilted rearwardly as shown in dotted lines in Fig. 2. When so positioned the relative long drill bar 56 is inserted into hole H until its upper end is below the lower end of drilling motor 30 for connection therewith. This operation can be continued to produce a hole of any desired depth.

When the contour of the ground is not in a horizontal plane and the tiller wheel I4 is above or below the level of wheels I2, then in order to maintain standard I8 in a substantially vertical Yposition it becomes necessary to shorten or lengthen the truss rod 76. This varying of the -length of rod 'I6 is accomplished by grasping the .at I| 6 intermediate its ends with a link |I8 which is pivoted at |20 to the upper end of tube '16. By pressing downwardly on the outer end of lever |I4 the tension on pin94 is relieved so that it can be removed and the partsadjusted until the standard is in the desired vertical position then the pin 94 is inserted in the holes nearest to the registered position to maintain the tubes against relative longitudinal movement.

In the operation of this drilling apparatus when it is being used for Adrilling holes for blasting purposes Where the holes are close together, the operator can easily move and guide the apparatus by means of therhandle, I6. VThe changing of the drill rods can be easily and quickly accomplished because vofv the toggle securing means which can be operated by a simple movement. It will be noted that the tilting movement of the standard is limited by the end of tube 84 striking against the bosses |22 for pin 98.

It is apparent that many minor changes'in the construction of this apparatus might be made without departing from the spirit of the invention. 'j

What I claim as new and Adesire to cover by Letters Patent is:Y

1. In a derrick drill a base frame; a standard pivoted at its lower end to said b ase frame; a drilling motor adjustably carried by said 'standard adapted to operate a drilling rod carried thereby to form a drill hole, a longitudinally adjustable truss rod adapted to normally support said standard in anupright position, and a toggle means operable to vary the effective length of said truss rod and to force said standard about Yits pivot to vary its angled relation to said base frame. i Y l 2. In a derrick drill a portable Abase frame, a standard pivotally carried by said base frame, a drilling motor, adjustably carried by said standard, .having a removable drillingrod; a longitudinally adjustable truss rod adapted to normally support said standard in an upright position on said -base frame; and toggle means having a hand operable lever movable to forcibly Vary v the length of the truss rod whereby the angled relation between said standard and its supporting base frame is varied. f 3. In a derrick drill a portable base' frame; a standard pivotally carried by'said base frame; a drillingmotor having a removable 'drilling rod carried for vertical movement by said standard; an adjustable truss rod joining said standard to the base frame; means vfor adjusting` the effective length of said truss rod; and toggle means operable to forcibly vary the length lof said truss rod to tilt said standard to and from a pre-determined angle relative to the base frame.

4. In a derrick drill a base frame mounted on wheels; a standard pivotally mounted on said base frame; a carriage mounted for longitudinal movement along said standard; a drilling motor hingedly mounted on said carriage having a detachable drill bar carried thereby; an obliquely disposed telescoping truss rod interconnecting the upper end portion of said standard with said base frame whereby they are normally secured in a xed relative relation, and a toggle member engaging certain sections of said truss rod operable to forcibly telescope and change the effective length of said truss rod whereby the angled relation of the standard and base frame is varied.

5. In a derrick drill a 4base frame mounted on Wheels; a standard pivotally mounted on said base frame; a carriage mounted for longitudinal movement along said standard; a drilling motor hingedly mounted on said carriage having a detachable drill bar carried thereby; a three piece telescoping truss rod interconnecting the said standard to said base frame whereby they are normally secured in a xed relative relation; means for Varying the effective length of said truss rod; and a toggle member operable to cause relative longitudinal movement of certain of said telescoping truss rod pieces whereby the relative angular relation of said standard and base frame is altered.

6. In a derrick drill a portable base frame; a standard pivotally mounted on said base frame; a carriage mounted for longitudinal movement along said standard; a drilling motor hingedly mounted on said carriage having a detachable drill bar carried thereby; a three piece telescoping truss rod interconnecting the said standard to said base frame whereby they are normally secured in a fixed relative relation; means for varying the normal effective length of said truss rod; and a toggle member operable to cause relative longitudinal movement of certain of said telescoping truss rod pieces whereby the relative angular relation of said standard and base frame is altered, and means to secure said toggle member in the extended position When the truss rod is extended to its normal effective length.

LEE E. MATHE-W S. 

